Oh, I'm sure iron is in there, it's a common enough metal, used for many things. Here's something you can try write your lead answers with iron, as questions, for example:
Lead boils at White Heat
Iron boils at ...
Lead is a little acted upon Muriatic Acid
Iron with muratic acid ...
and see what you can learn. Also, you may have been assigned this task in class, but to tell the truth, you're just gathering element trivia. So references may be hard to find, this is all just "common knowledge" for metallurgists, they may not be well occupied with "peer-review of the boiling lead at white heat", as an example.